Anonymous supporters who willingly enlisted their personal computers to launch denial-of-service attacks against the groups' enemies may have unwillingly donated their personal banking information in the process. After the Jan. 20 raid on Megaupload, a law enforcement sting that drew the immediate anger of Anonymous hackers, an unnamed attacker took a distributed denial-of-service (DDoS) attack tool called Slowloris, popular with Anonymous supporters, and rigged it to include the Zeus Trojan, a devious piece of malware used to siphon victims' online banking credentials.

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